Mutations in the gene of Cav1.4, CACNA1F, can lead to X-linked retinal diseases such as Åland Island Eye Disease (AIED) [10], cone-rod dystrophy (CORDX3) [11] or congenital stationary night blindness type 2 (CSNB2) [12,13]. Here, CACNA1F is linked to Åland Islands eye disease.